<!--除登录页面外,所有页面的父级页面,编写共有的左侧菜单栏与头部-->
<template>
<!--  落魄谷中寒风吹，春秋蝉鸣少年归。 荡魂山处石人泪，定仙游走魔向北。 逆流河上万仙退，爱情不敌坚持泪。-->
  <!--display: flex; 给父容器添加弹性布局,可以横向排列子元素 -->
  <div style="display: flex;">
    <div :style="{width: (isCollapse ? '64px' : '208px')}">
      <!-- 左侧菜单栏-->
      <el-menu
          background-color="#3C82F5"
          text-color="#fff"
          active-text-color="#ff0"
          style="height: 100vh;width: 100%"
          :collapse="isCollapse"
          unique-opened
          router
          :collapse-transition="false"
          @select="selectMenu"
      >
        <!-- 左侧菜单栏的顶部条-->
        <el-row style="padding-top: 10px">
          <el-col :span="2"></el-col>
          <el-col :span="7" style="padding-left: 7px">
            <router-link to="/">
              <el-avatar src="/imgs/admin/logo.png" style="width: 35px;height: 35px;"></el-avatar>
            </router-link>
          </el-col>
          <el-col :span="isCollapse ? 0 : 13">
            <router-link to="/"
                         style="color: #fff;font-weight: bold;text-decoration: none;position: relative;top: 6px;left: 2px;">
              智慧车辆
            </router-link>
          </el-col>
        </el-row>
        <!-- 左侧菜单栏的菜单项-->
        <el-sub-menu index="1">
          <template #title>
            <el-icon style="font-size: 21px">
              <User/>
            </el-icon>
            <span>用户管理</span>
          </template>
          <el-menu-item index="/user">用户列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title>
            <el-icon style="font-size: 21px">
              <Van/>
            </el-icon>
            <span>车辆管理</span>
          </template>
          <el-menu-item index="/vehicle">基本信息</el-menu-item>
          <el-menu-item index="/repair">车辆维修</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="3">
          <template #title>
            <el-icon style="font-size: 21px">
              <Location/>
            </el-icon>
            <span>电子围栏</span>
          </template>
          <el-menu-item index="/geofence">围栏管理</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="4">
          <template #title>
            <el-icon style="font-size: 21px">
              <Place/>
            </el-icon>
            <span>调度管理</span>
          </template>
          <el-menu-item index="/application">申请列表</el-menu-item>
          <el-menu-item index="/audit">调度审核</el-menu-item>
          <el-menu-item index="/distribute">车辆分配</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="5">
          <template #title>
            <el-icon style="font-size: 21px">
              <MessageBox/>
            </el-icon>
            <span>数据字典</span>
          </template>
          <el-menu-item index="/dict">字典管理</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
    <div :style="{width: (isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)')}">
      <!-- 顶部菜单栏-->
      <el-header style="height: 10vh;background-color: #fff;padding-top: 22px">
        <el-row :gutter="10">
         <el-col :span="18">
           <el-icon style="font-size: 20px" @click="isCollapse = !isCollapse"><Expand/></el-icon>
         </el-col>
         <el-col :span="6" style="position: relative;">
           <el-dropdown trigger="click" style="position: absolute;right: 20px;">
              <span style="font-size: 19px;font-weight: bold;">
               {{user.username}}
                <el-icon ><arrow-down /></el-icon>
              </span>
             <template #dropdown>
               <el-dropdown-menu>
                 <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
               </el-dropdown-menu>
             </template>
           </el-dropdown>
         </el-col>
        </el-row>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/" style="position: relative;top: 15px;">
          <el-breadcrumb-item >首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb">{{item}}</el-breadcrumb-item>
        </el-breadcrumb>
      </el-header>
      <!-- 右侧主体内容-->
      <el-main style="height: 90vh;padding: 0;overflow-y: auto;">
        <router-view/>
      </el-main>

    </div>
  </div>

</template>
<script setup>
import {ref} from "vue";

// 定义变量,控制左侧菜单栏的折叠与展开
const isCollapse = ref(false);
// 定义按钮的方法,可以控制左侧菜单栏的折叠与展开
const changeCollapse = () => {
  isCollapse.value = !isCollapse.value;
}
// 获取当前登录的用户信息
const user = ref(getUser());
// 退出登录按钮
const logout = () => {
  if (confirm('确定退出登录吗？')){
    localStorage.removeItem('user');
    localStorage.removeItem('breadcrumb');
    user.value = '';
    window.location.href = '/login';
  }
}
// 面包屑导航栏默认值,默认值是['用户管理','用户列表']
const breadcrumb = ref(JSON.parse(localStorage.getItem('breadcrumb'))||['用户管理','用户列表']);
// 定义一个集合存储路由与面包屑导航栏的映射关系
let map = {
  '/user':['用户管理','用户列表'],
  '/vehicle':['车辆管理','基本信息'],
  '/repair':['车辆管理','车辆维修'],
  '/geofence':['电子围栏','围栏管理'],
  '/application':['调度管理','申请列表'],
  '/audit':['调度管理','调度审核'],
  '/distribute':['调度管理','车辆分配'],
  '/dict':['数据字典','字典管理']
}
// 定义一个方法,根据路由地址,动态设置面包屑导航栏
const selectMenu = (index) => {
  //console.log(map[index]);
  breadcrumb.value = map[index];
  // 把数据存储到localStorage中,解决刷新后,面包屑导航栏丢失的问题
  localStorage.setItem('breadcrumb',JSON.stringify(breadcrumb.value));
}
</script>